baber/WOPTO huggingface dataset:
Patent GB-765788-A (GB)
Title: Improvements in or relating to apparatus for deriving voltages that are approximately proportional to predetermined functions of angles
IPC: G06G7/22
Filed: 1953-12-07
Abstract: 765,788. Electric analogue computing. GENERAL ELECTRIC CO., Ltd., and GORDON, G. Nov. 25, 1954 [Dec. 7, 1953], No. 34036/53. Class 37. A function generator for deriving a voltage approximately proportional to a predetermined function, (f(#)) of an angle 6, comprises a servosystem 3, Fig. 2, in which a motor 5 sets a shaft 1 to a position # 0  in dependence on an input angle # 1 , the shaft driving two potentiometers 6, 8. The potentiometer 6 is wound according to f(#) and the potentiometer 8 is wound d according to -.(f(#)). A fixed voltage is applied d# across the potentiometer 6 and a voltage proportional to the error #= # 1  - # 0  is applied across the potentiometer 8, the potentiometer outputs being added at 12 to give a voltage proportional to f(#)+#.d/d#.(f(#)). Under steady state conditions the error voltage e which is derived in the usual manner by negative feedback of the output # 0  from a linear potentiometer 4, is zero, giving the output f(#), but when the input # 1  is changing rapidly the output f(#)+.d/d#.(f(#)) gives a first approximation to f(#). The function may be sin #, in which case the output is sin #+#.cos #. To obtain an output voltage approximating to A. sin 6, where A is a constant, the servo system of Fig. 2 is used but modified in that the error voltage # is fed as input to a further servo system 13, Fig. 3, the output shaft 14 of which drives a linear potentiometer 17. A fixed voltage A is applied at 18 to produce A . e at the output of potentiometer 17 which is applied to the potentiometer 8. The potentiometers 6, 8 yield outputs A sin # 0  and A. e . cos # 0  which are added at 12 to give the required approximation. Alternatively, the error voltage e may be fed to the potentiometer 17 and the voltage A to the input of the servosystem 13. A voltage approximating toA.cos # may be similarly obtained. Co-ordinate conversion, Fig. 4. To convert cartesian co-ordinates A x , A y  into the corresponding cartesian co-ordinates B x =A x  cos # 1 +A y  . sin # 1  and B y =A x  sin # 1  - A y  . cos # 1  referred to axes making an angle # 1  with the original axes, a voltage # 1  is fed at 21 to a servosystem 24, and voltages A x , Ay to points 22, 23. As described for Fig. 3, the servo-system 24 and an auxiliary servo-system 25 are arranged to supply a voltage approximately proportional to Ay . sin # 1  over a path 26. Over further sine and cosine potentiometers 28, 29 driven by the servo 24 a voltage approximately proportional to Ay . cos # is similarly derived on line 31. Further potentiometers 33-36 which may be driven by the servo-system 24 but are preferably driven by a separate identical parallel driven servo-system 32, yield in a similar manner, output voltages approximately proportional to A x . cos # 1  and A x . sin # 1  which are added algebraically at 41, 40 in appropriate pairs with the outputs over lines 26, 31 to give the desired values to a first approximation.
Patent GB-1218705-A (GB)
Title: Error indicating apparatus
IPC: H03K5/1532
Filed: 1969-07-08
Abstract: 1,218,705. Magnetic data storage. INTERNATIONAL BUSINESS MACHINES CORP. 8 July, 1969 [15 July, 1968], No. 34261/69. Heading G4C. Apparatus for indicating error in an input signal which periodically alternates in polarity and is coded to represent a train of binary digits, comprises first threshold means effective to indicate when the signal exceeds a first threshold for either polarity, second threshold means effective to indicate when the signal exceeds a second higher threshold for either polarity, and means giving an error indication if there is no output from the second threshold means to coincide with the output from the first threshold means delayed. As described, each threshold means comprises two threshold devices to detect when the threshold is exceeded positively and negatively, respectively, in the differentiated output of a reading head sensing a magnetic recording medium. The leading edges of the outputs from the threshold devices for the first (low) threshold (indicating zero crossings approximately) produce clock pulses which are used to decode the data in data detect circuitry as in Specification 1,213,688 referred to, and also produce pulses which are delayed and used to sample the inverted AND of the outputs of the positive threshold devices ORed with the inverted AND of the outputs of the negative threshold devices, any pulse produced by the sampling resetting the data detect circuitry since if the high threshold level has not been reached within the delay referred to after the low threshold level was reached it was presumably (inter-character) noise which exceeded the low threshold level. Each high threshold device, once its threshold has been exceeded, maintains its output until the signal falls below the low threshold. A single threshold device, responsive to both polarities, could be used in each of the two (high and low) threshold means. Parity is also mentioned.
Patent GB-174271-A (GB)
Title: Improvements in the manufacture of steel and alloy steels
IPC: C21C7/00
Filed: 1920-12-04
Abstract: 174,271. Hamilton, W. B., and Evans, T. A. Dec. 4, 1920. Thermo-aluminic and like metal-extracting processes.-Rustless steel or alloy steel containing a low percentage of carbon and up to 15 per cent of chromium, is made by adding to a molten decarburized steel bath while in an electric furnace a mixture of aluminium and commercial chrome ore. with or without a small quantity of manganese ore.
Patent GB-960058-A (GB)
Title: Improvements in or relating to three-way fluid-flow control valves with adjustable overlap
IPC: F16K11/065
Filed: 1962-09-07
Abstract: 960,058. Valves. ANDRE CITROEN S.A. Sept. 7, 1962 [Sept. 7, 1961], No. 34310/62. Heading F2V. A piston valve with inlet, outlet and working ducts 2, 3 and 4, Fig. 1, respectively, opening transversely into a bore has a spool member slidable in the bore, which spool is made-up of two parts 5, 6 that are interconnected by a threaded coupling element 7 ; a spring is interposed between the spool parts. The latter are relatively adjustable to provide for any desired degree of overlap. In a modification, the spool parts 5a, 6a, Fig. 2, are interconnected by a frame comprised of rods 11, 12 and cross members 9, 10, one of which is joined to its associated spool part by an adjustable screw 7a. The spool parts may be of different diameter. Specification 919,145 is referred to.
Patent GB-1496179-A (GB)
Title: Apparatus for manufacturing gear wheels or toothed segments
IPC: B21H5/02
Filed: 1975-08-19
Abstract: 1496179 Rolling gear teeth E SEIGWART 19 Aug 1975 [19 Aug 1974] 34373/75 Heading B3M Apparatus for forming a toothed gearwheel or segment from a sheet metal blank 3 includes a drive shaft 1 for rotating the blank, and a gear transmission for driving a rolling die 15 from the shaft. The transmission includes gears 7, 10 and 11 which rotate a shaft 12 carrying the die, and allow the blank and die to be moved towards or away from each other. The shaft 1 may be driven by the chuck of a lathe, and the die 15 moved into contact with the blank by an arm 16. The blank is held between two pressure plates, and the die 5 is flanked by discs 13 and 14 which limit the lateral spread of the rolled teeth, Fig. 4.
Patent GB-804668-A (GB)
Title: A dynamo-electric machine brush holder
Inventor: TOOKE GEORGE SYDNEY
IPC: H01R39/38
Filed: 1955-12-01
Abstract: 804,668. Brush-gear and brush-holders for electric machines. LUCAS (INDUSTRIES), Ltd., J. Nov. 22, 1956 [Dec. 1, 1955], No. 34391/55. Class 35. Dynamo-electric machine brush holder of a toggle-like kind designed to be slid into position in a channel in the machine and held therein by a spring r comprises three separately made pieces a, b, m, two a, b of which form the holder sides serve to receive the brush d and are hingedly connected together at one end, and the third m of which is pivotally attached to and interlocks the other ends of the two pieces A, B and also carries the spring r. Trunnions f and a recessed fork e on respective side pieces a, b form the hinged connection, ciaxoal trunnions o and central sockets j provided respectively on the end piece m and in the two side pieces a, b, or vice versa, form the pivotal attachment, and portions p of end-piece m when the latter is angularly moved overlap segmental lips q on the ends of the side pieces a, b to form the interlock. At the centre of the spiral spring r is a key-piece s which engages in slots in lugs n of end-piece m and the free end of the spring is extended to bear on the outer end of the brush d. To place the holder in the machine, the lower part of end-piece m is engaged with a recess t at the outer end of each ramp h provided at each side of the channel in the machine housing i, and pressure on the pivot point and in a direction axially of the machine causes relative angular movement between the piece m and pieces a, b against the action spring r, whereby projections g on pieces a, b ride along the ramps h until they snap over into recesses u. Specification 790,247 is referred to.
Patent GB-463748-A (GB)
Title: Improvements relating to muting in radio receivers
IPC: H03G3/26
Filed: 1935-12-12
Abstract: 463,748. Valve circuits for wireless reception. COLE, Ltd., E. K., and MARTIN, A. W. Dec. 12, 1935, No. 34426. [Class 40 (v)] A low - frequency amplifying pentode V2 in a wireless receiver is muted in the absence of signals of above a predetermined amplitude by a negative bias on the auxiliary grid 2 which is connected to a point Q on a potential divider across the anode source. The cathode of valve V2 is connected to a point P on the cathode resistance 3, 4 of a valve V1 the anode current of which is controlled by A.V.C. potentials. If said anode current is sufficiently reduced the potential of the point P becomes equal to or negative relative to that of the point Q and the valve V2 becomes operative. A.V.C. potentials may be applied to the control grid of valve V2.
Patent GB-1149064-A (GB)
Title: Improvements in and relating to means for detecting malignant cells in human and animal tissue
Inventor: SMART DESMOND
IPC: G01N21/21
Filed: 1966-08-01
Abstract: 1,149,064. Television. INTERNATIONAL RESEARCH & DEVELOPMENT CO. Ltd. 26 July, 1967 [1 Aug., 1966], No. 34474/66. Heading H4F. [Also in Division G2] A polarimeter for use in detecting malignant cells in human or animal tissue comprises a source of plane polarized light, in particular a laser 1, which is directed on to a tissue specimen mounted on a stage 3, a plane polarizing element 5 arranged to intercept light transmitted by the tissue, and a microscope 4 which receives light from the polarizer 5. The plane of polarization of the polarizer 5 is arranged with respect to the plane of polarization of the laser 1 so as to block all light transmitted by normal tissue cells. As shown in Fig. 2, a second microscope 7 receives light transmitted by the tissue before it passes through the polarizing element 5. Television cameras 8, 9 are arranged to scan the images produced by the microscopes 4, 7. The camera outputs are relayed through amplifiers 11, 12 and a mixer unit 13 and superimposed images of the tissue are formed on a display screen 14. When the tissue contains malignant cells these scatter light to a greater extent than normal cells and so reduce the intensity of the light incident on the microscope 7. Simultaneously malignant cells rotate the plane of polarization of the incident light so that a positive signal is transmitted by the camera 8. A pulse equalization network 17 connected between the amplifier 11 and the mixer 13 is arranged to cancel out the variations in the two signals produced by malignant cells so that their presence in a tissue specimen is indicated by a blank screen 14. A cinÚ camera synchronized with the television cameras may record the image on screen 14.
Patent GB-879792-A (GB)
Title: Preparation of substituted triphenylethylenes
IPC: C07D295/092
Filed: 1957-11-06
Abstract: The invention comprises compounds of the general formula: <FORM:0879792/IV (b)/1> (wherein the -OCnH2nA group is attached in the m or p position to the benzene ring, n is 2, 3 or 4, A is an amino group or an alkylamino group, in which the alkyl portion has 1 to 4 carbon atoms, or a di-haloalkyl-amino group, in which each alkyl portion has 1 to 4 carbon atoms, or an N-pyrrolidinyl, N-piperidyl, N-morpholinyl or 4-methyl-1-piperazinyl group, R is a hydrogen or halogen atom or a methyl or methoxy group and both atoms or groups R may be the same or different, and X is a hydrogen or halogen atom, with the proviso that when X is a hydrogen atom, at least one R is a halogen atom or a methyl or methoxy group unless A is one of the indicated heterocyclic groups), and the preparation thereof by (1) when X is a hydrogen atom and A is other than a di-haloalkyl-amino group, dehydrating the corresponding triphenylethanol; (2) when X is a hydrogen atom and A is a di-haloalkyl-amino group, dehydrating the corresponding triphenylethanol in which A is a halogen atom, reacting the resulting haloalkoxy-substituted triphenylethylene with a dialkanolamine in which each alkyl group has 1 to 4 carbon atoms, and then reacting the resulting product with a halogenating agent; or (3) when X is a halogen atom, halogenating the corresponding triphenylethylene or triphenylethanol.  When A is an amino or alkylamino group, in which the alkyl portion has 1 to 4 carbon atoms the corresponding substituted triphenylethanols may be prepared by catalytic hydrogenolysis of the corresponding substituted triphenylethanols in which A is a dibenzylamino group.  The latter may be prepared by reacting a suitably substituted benzylmagnesium halide with a benzophenone substituted by an -OCnH2n[N(CH2C6H5)2] group, p  which may be obtained by reacting a hydroxybenzophenone with a dibenzylamino-alkyl halide.  When A is a di-haloalkyl-amino group, in which each alkyl portion has 1 to 4 carbon atoms, the corresponding substituted triphenylethanols may be prepared by reacting an alkali metal salt of a hydroxybenzophenone with an alkyl halide to obtain a haloalkoxy benzophenone and reacting this compound with a benzylmagnesium halide.  Similarly prepared are the substituted triphenylethanols in which A is one of the indicated heterocyclic groups.  Specification 822,854 is referred to.
Patent GB-1372023-A (GB)
Title: Imaging systems
IPC: H01J37/24
Filed: 1971-10-01
Abstract: 1372023 Television MULLARD Ltd 1 Oct 1971 [16 July 1970] 34617/70 Headings H4F and H4T A pattern generator, Fig. 8, and 54, Fig. 11, is provided to produce scanning signals for a television camera and receiver, Fig. 11. The scanning signals may produce a normal raster scan, a pseudo-random scan (Figs. 5, 9, not shown) or a scan where different areas of a scene are scanned with different resolutions (Fig. 10, not shown), in which case the high resolution area of the scan may be moved relative to the total area scanned. The generator uses two stores 4, 5, Fig. 8, to store binary numbers relating to the required movement of the scanning beam and these numbers are fed to respective arithmetic units 6, 7 each of which repeatedly adds or subtracts the number applied to it to the total stored therein. The outputs from units 6, 7 are fed to a data patch 25 which passes its inputs, possibly mixed, to digital-toanalogue converters 8, 9. The outputs from data patch 25 are also fed to X and Y scan limit detectors 22, 23 and zone detector 24 which have outputs connected to control patches 26, 27, which control the stores, arithmetic units and digital-to-analogue converters. For example with a scan having areas of differing resolution, zone detector 24 may detect whether outputs from data patch 25 would cause the scanning beam to be within the higher or lower resolution area of the scanned scene, the control patches 26, 27 causing scanning of every picture element within the higher resolution area, but only every nth picture element within the lower resolution area. To produce a normal raster scan the number 1 is always fed from the stores 4, 5 and added to the total in arithmetic units 6, 7, the outputs of units 6, 7 being connected directly to converters 8, 9 and the arithmetic unit 7 only being operable in response to a "carry" signal from unit 6 or a scan limit detector. A pseudorandom scan may be produced similarly, but with arithmetic unit 7 set to subtract the input (i.e. add the complement of the input) to its total and the connections between units 6 and 7 and converters 8 and 9 being cross-coupled (Fig. 7, not shown).
Patent GB-776082-A (GB)
Title: Improvements in photographic processing solutions
Inventor: SMITH ERIC THOMAS
IPC: G03C5/38
Filed: 1954-11-30
Abstract: 776,082. Photographic developing solutions. KODAK, Ltd. Nov. 29,1955 [Nov. 30, 1954], No. 34619/54. Class 98(2) A photographic developing solution comprises catechol as the developing agent together with at least 9 grams per litre of caustic alkali (calculated as NaOH) and at least 40 grams per litre of sodium thiosulphate (calculated as Na 2 SO 3 ) and 75 to 175 grams per litre of sodium sulphite (calculated at Na 2 SO 3 ). At least 60 grams per litre of sodium thiosulphate may be used, and an amount of caustic alkali giving from 9 to 16 grams per litre (calculated as NaOH) uncombined with any sodium bisulphite which may have been used may be incorporated. After processing in the solution, a print can be immediately wiped without rinsing or washing, and dried. An example of a suitable solution is given, and stock solutions for mixing to obtain a working solution are specified, that containing the catechol also including sodium sulphite and bisulphite.
Patent GB-884931-A (GB)
Title: Circuit arrangements including vidicon pickup tubes
IPC: H04N5/228
Filed: 1960-10-10
Abstract: 884,931. Television pick-up tubes. FERNSEH G.m.b.H. Oct. 10, 1960 [Oct. 8, 1959], No. 34624/60. Class 39(1) [Also in Groups XL(b) and XL(c)] To compensate for undesired voltage pulses induced electrostatically on signal plate 1 of vidicon camera tube 2 from line deflection coils 4, 5, a voltage in phase opposition thereto is derived either from the centre-tapped secondary winding 6 of a transformer whose primary is in series with the deflection coils, or from an inductive loop on a moveable support and coupled to the deflection coils, Fig. 2 (not shown), and the derived voltage is fed to final anode 14 of the tube.
Patent GB-1003593-A (GB)
Title: Process for consolidating sewage sludge
IPC: C02F11/12
Filed: 1962-09-11
Abstract: Effluents are consolidated by addition of a weighting agent and an agglomerating agent followed by decantation and further addition of agglomerant.  The agglomerants are generally natural and synthetic polyelectrolyte while the exemplified weighing agents are gypsum, coal ash, limestone, cement or coal waste.
Patent GB-742977-A (GB)
Title: Improvements in or relating to electric carrier current communication systems
Inventor: HODGSON KENNETH GEORGE
IPC: H04J1/04
Filed: 1953-12-14
Abstract: 742,977. Multiplex systems. STANDARD TELEPHONES & CABLES, Ltd. Dec. 14, 1953, No. 34709/53. Class 40 (4). [Also in Group XL (c)] A single sideband modulator, i.e. in which one sideband is not produced as distinct from excluded from the output by a filter, is modified to have a second signal input producing an opposite sideband representing the second signal. As shown the first and second signals are applied at 7, 8 to two modulators 1, 2 through networks 5, 6 shifting the relative phase of each signal applied to the modulators by #/2 and a carrier source 3 also applies carrier waves to the modulators differing in phase by #/2. The combined output at 9 from the modulators is then a single lower sideband of the input 7 and a single upper sideband of the input 8. The input 8 may be used for producing supervisory, e.g. automatic gain, control of the input at 7 and may include, besides speech, one or more telegraph tone frequencies. The sidebands may be separated and demodulated by applying them to modulators 1, 2 (Fig. 3) to which carrier of the same frequency as the original carrier source and relatively phase displaced by #/2 is also applied, the modulator outputs then being relatively phase displaced by #/2 and applied to a centre-tapped output transformer 11, one demodulated sideband being obtained from the secondary and the other from the centre tap. Hybrid decoupling circuits may precede and follow the phase shifters 5, 6 (Fig. 2). A series of modulator circuits as in Fig. 2 may be employed, with discretely spaced frequencies of the carrier source 3, each sideband producing different upper and lower speech channels. Specification 260,067, [Class 40 (iv)], is referred to.
Patent GB-427987-A (GB)
Title: Improvements relating to centrifugal pumps
IPC: F04D29/58
Filed: 1933-12-09
Abstract: 427,987. Centrifugal pumps. MATHER & PLATT, Ltd., and PENNING- TON, R., Park Works, Newton Heath, Manchester. Dec. 9, 1933, No. 34736. [Class 110 (i)] Impeller neck bushes e are cooled when the pressure in the stage falls below a predetermined amount by water from a bus pipe a which flows through a valve c and a pipe b to bush recesses f.
Patent GB-303108-A (GB)
Title: Improvements relating to reducing or multiplying gearing
IPC: F16H57/031
Filed: 1928-11-26
Abstract: 303,108. Soc. Anon. des Engrenages Citroen. Dec. 28, 1927, [Convention date]. Toothed gearing.-The invention set out in Specification 257,183, in which high and low speed shafts of reducing or multiplying gearing are mounted adjustably in slots in the edges of a casing, the top of which is closed by a cover, so that the gear-wheels may be changed to vary the speed, is modified by providing three parallel shafts, the low-speed shaft 9 and intermediatespeed shaft 13 being mounted in vertical slots 6, 7 and the high-speed shaft 18 in inclined slots 8. The speed ratio is changed by replacing the pinion 19 on the shaft 18 by another of different size, adjusting the shaft in the slots 8 as necessary, the wheels 10, 14, 15 remaining unchanged. The bearings of the shafts are carried in boxes 11, 16, 20, covers 12, 17, 21 and an adjustable oil-sealing cap 22 for the movable shaft being provided and secured by bolts as in the earlier Specification. The bosses 3, 4, 5, against which the boxes and covers bear, together with the upper surface of the casing on which the cover bears, are finished on a, milling or other machine employing three groups of tools.